Apparatus for controlling the artificial blast in locomotives.



6. DE GRAHL.

APPARATUS FOR CONTROLLING THE ARTIFICIAL BLAST IN LOCOMOTIVES.

APPLICATION FILED JUNE 17, 1910.

1,061,668. Patented May13,1913.

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fiver/Z02" Wz'izaeeses G. DE GRAHL. APPARATUS FOR CONTROLLING THEARTIFICIAL BLAST IN LOCOMOTIVES.

- APPLICATION FILED JUNE 17, 1910.

1,061,668. Patented May13,1913.

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1,061,668. Patented May1 3, 1913.

G. DE GRAHL. APPARATUS FOR CONTROLLING THE ARTIFICIAL BLAST INLOCOMOTIVES.

APPLIOATION FILED JUNB17, 1910.

1,061,668. Patented May 13, 1913.

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J 2 433711935 Jae/en 0? $3265 6) d8 maz GUSTAV Dr: GRAHL, OF

ZEHLENDORF, NEAR BERLIN, GERMANY.

APPABTATUS FOR CONTROLLING THE ARTIFICIAL BLAST IN LOCOMOTIVES.

Specification of Letters Patent.

Application filed June 17. 1910. Serial No. 567,403.

Patented May 13, 1913.

To all whom, i t ma-y concern:

Be it knowmthat I, GUSTAV on GRAHL, a subject of the German Emperor, andresiding at Zehlendorf, near Berlin, Germany, have invented certain newand useful I mprovements in Apparatus for Controll ng the ArtificialBlast in Locomotives, of which 7 the following is a specification.

The subject-matter of my invention is an improved apparatus forcontrolling the art1 ficial draft in boiler-furnaces and it comprisesmeans by which the main-draft 1s actuated by admission of steam. It alsoineludes a regulating piston actuated by livesteam by means of which theadmission of steam to the auxiliary blast is shut oft"; by shutting oilthe steam from the engine the main draft is interrupted and by actuatingthe regulating iston in opposite d rection the admission 0 steam to theauxiliary blast is obtained again. D

The new feature of my invention consists in providing two valves whichare preferably manually operatable; one of said valves controls theadmission of steam to the auxiliary blast as well as to thesteam-nozzles of the furnace andit may be opened automatically by theregulating piston when the steam is admitted to the engine. But saidvalve may be closed manuallv if the steam is shut off from the engine.The other valve can be opened manually in order to admit steam to theauxiliary blast, if the steam is shut off from the engine, and byclosing the first named valve the admission of steam to the auxiliaryblast is also obstructed.

One illustrative embodiment of my invention is represented by way ofexample in the accompanying drawing, wherein Figure 1 is a longitudinalsection, partly in elevation, showing my new eombinatlon of valvesregulating the admission of steam to the steam nozzles and to theauxiliary blast, Fig. 2 is a section on the bent line AB in Fig. 1, Fig.3 a section in the plane CD in Fig. 1 as seen in the direction of thearrow 3, and Fig. 4 a section in the plane E-F in Fig. 1 as seen in thedirection of the arrow 4; Figs. 5 and 5 show in side elevation alocomotive boiler provided with my improve apparatus and Figs. 6 and 6are a plan view of this locomotive boiler; Fig. 7 shows the locomotiveboiler with arts broken away showing the interior 0 the dome, while Fis. 8 and 9 show details, enlarged, in end elevation and in two differentpositions as seen in the direction of the arrow 65 in Fig. 3. Fig. 10shows a vertical section through the fire-box, disclosing thesteam-nozzles. Fig. 11 shows a horizontal section through the fire-boxalso disclosing the steam-nozzles.

Referring to the drawings, and firstly particularly to Figs. 57, 1designates the locomotive boiler and 2 the cylinder, whose slidevalvechest 63 is connected by a pipe 64 with the dome 5. The shaft 6 extendsthrough the end part of the boiler and is journaled at one end ,at 7.The supply of steam to the pipe 64 can be shut off or opened at 8 by aslide-valve 9, which is pivotally connected by a rod 10 with a lever 11provided on the shaft 6, carrying the regulator lever 12. The steamchest 63 is also connected by a pipe 13 with the blast nozzle 14. Theapparatus 15 (Fig. 5) comprising the valves according to my invention issecured laterally on the boiler.

Referring now to Figs. 1 to 4, my apparatus comprises a valve box, inwhose cylindrical portion 16 the piston 17 is slidable. This piston runsout at one end into the piston 18 which is larger in diameter than theiston 17 and is slidable in the part 19 of tievalve box. The other endof the piston runs out into a valve disk 20 whose seat is at 21. Thepart16 of the box is connected by way of the passage 22 with the part 23 ofthe box, in whose stuffing box 24 the rod 25 is movable longitudinally.This rod is provided with the valve disk 26 whose seat is at 27. Theprojection 28 of the valve disk 20 can act, whendisplaeed axially, onthe valve disk 26 and lift the latter from its seat. The rod 25 isconnected with the rod 29, on which is provided a hollow shaft 30 (Figs.1, 5, 7, 8, 9) journalcd in the bearings 31. A lever 32 is secured onthis hollow shaft and a ring 33 is'free to rotate thereon between twoset screws. A lever 36 is pivot-- ally connected to the ring 33 at 35, alever 38 being pivotally connected at 37 with the lever 36. The rod 29is pivoted at 39 to the lever 38. The pipe 40, connected with the pipe64 leading to the steam chest, opens into the part 19 of the valve box.The pipe 41 connected with the duct 42 is an air-relief pipewhieh allowsair to issue from the part 19 of the valve-box when the piston 18 movesto the right. The pipe 43 opening into the space between the valve disks20 and 26 is connected with the steam nozzles of the fire-box. The part19 of the valve box is connected by the check valve 44 with the duct 45.The latter opens into an elbow 46, to which the pipe 48 leading to theauxiliary blast 47 is attached. (Figs. 2 and 5.) The part 23 of thevalve box is connected by the bend 49 with the socket or valve box 50containing a valve disk 51 which can be screwed against its seat 53 byturning a rod 52 and shut-off the passage 49 from the elbow 46. The pipe54 connected with the steam space of the boiler and particularly withthe dome opens into the part 23 of the valve box. An arm 55 is securedon the rod 52 and an arm 56 on the hollow shaft 30. (Fig. These two armsare pivotally connected by two straps or links 57, and provided withprojections 71, 72 respectively, (Figs. 8 and 9) possessing the form ofspherical segments. Holes 75 and 76 in the levers 55 and 56 for thepivots 74, 73 respectively are gradually enlarged toward their ends.Consequently the rod 52 may be shifted longitudinally relatively to thehollow shaft 30 when the valve disk 51 is to be screwed from its closedposition into its open position as will be understood from Figs. 8 and9.

My improved arrangement of valves operates as follows: When starting theengine the regulator 12 is turned into the open position, in which theslide-valveQ admits steam to the pipe 64. Consequently steam is suppliedto the steam chest and thence into the cylinder, and after it has donework there passes as exhaust steam through the pipe 13 to the blastnozzle 14, whereby the main blast is simultaneously started. Live steamfrom the pipe 64 passes through pipe 40 into the part 19 of the valvebox. Steam also enters through the pipe 54 into the steam inlet chamber23 of the valve box. As the piston 18 has a larger diameter than thepiston 17, the steam in the part 19 will push the pistons 18, 17 intothe position shown in Fig. 1, in which the valve disk 20 is pressedagainst its seat 21 and the part of the valve box to the left of thecheckvalve disk 44 is shut off from the steam pipe 54. The valve disk26, on the contrary, cannot be seated because it is prevented by theprojection 28 of the valve disk 20. Consequently, the steam enteringthrough the pipe 54 into the part 23 can pass through the pipe 43 to thesteam nozzles in the fire box. When the engine is stopped, i. 0. whenthe steam is shut off from the engine by closing the valve 9 andaccordingly when the main draft is also stopped, the steam pressure inthe part 19 of the valve box disappears. Consequently, the steamentering into the part 23 of the valve box will push thepiston 17 to theleft and therefore the steam can pass through the check valve 65 44 andthe duct 45 into the pipe 48 leading to the auxiliary blast. It may alsoat the same time pass through pipe- 43 to the steam-nozzles in the'fire-box. Should the grate not be charged sutliciently high with coal,however, and should it be possible that the steam supplied through thepipe 43 into the fire box can accordingly extinguish the fire, byoperating the lever 38 and by shifting the rod 29 axially in thehollow-shaft 30 the valve disk 26 is seated by the rod 25 and the steamis cut off from the auxiliary blast and pipe 43 and the steam nozzles.If, by subsequently operating the lever 32, the sleeve 30 is rotated inits bearings 31 in the direction of the arrow 60 (Figs. 1 and 5), thevalve disk 51 is lifted from its seat 53; the part 23 of the valve boxand the pipe 48 are hereby connected, in spite of steam being shut offfrom the steam nozzles, and consequently good combustion of smoke isobtained.v lVhen steam is again admitted to theengine and the main draftis operated the valve disk 51 is moved to *-tificial draft inlocomotives the combination with a valve box 15 having a steam inletchamber 23, of steam nozzles 70 and auxiliary blast 47, a pipe 43connecting said valve box 15 with the nozzle 70, another pipe 48connecting the valve box 15 with the auxiliary blast, a non-return valve44 between the valve box 15 and the last named pipe 48, a manuallyoperated valve 26 in said box for shutting off steam from the said pipes43 and 48, a steam operated valve 20 in said box controlling theentrance of steam by way of the said non-return valve 44 to pipe 48leading to the auxiliary blast and for simultaneously preventing thefirst named valve 26 from shutting off steam from the pipe 43 leading tothe steam nozzles 70 another valve 51 for connecting and disconnectingsaid inlet chamber 23 with the pipe 48 leading to the auxiliary blast,said valve 51 being independent of the manually operated valve 26 insaid inlet chamber 23.

2. In an apparatus for controlling the artificial draft in locomotives,the combination with a valve box 15 having a steam inlet chamber 23, ofsteam nozzles 70 and auxiliary blast 47, a pipe 43 connecting said valvebox 15 with the nozzles 70, another pipe 48 connecting the valve box 15with the auxiliary blast 47, a non-return valve 44 between the valve box15 with the last named pipe 48, a manually operated valve 26 in said box15 for shutting off steam from the said pipes 43 and 48, a steamoperated valve 20 in said box 15 controlling theentrance of steam by wayof the said non-return valve with a valve-box having a steam inletchamber, of steam-nozzles, an auxiliary blast, a pipe connecting saidvalve box with the nozzles, another pipe connecting the valve box withthe auxiliary blast, a manually operated valve in said box for shuttingoff steam from the said pipes, a steam-operated valve in said box forshutting off steam from the pipe leading to the auxiliary blast and forsimultaneously preventing the first named valve from shutting ofii steamfrom the pipe leading to the steam-nozzles, another valve, a rotatableaxially displaceable rod connected with the last named valve, an arm onsaid rod, an axiallyslidable rod connected with said first named valve,an axially non-displaceable hollow shaft rotatable on the last namedrod, an arm on said hollow shaft and straps pivotally connecting the twoarms, the last named rod being displaceable longitudinally with respectto said hollow shaft.

4. In an apparatus for controllin the ar tificial draft in locomotivesthe com ination with a valve-box having a steam inlet chamber, ofsteam-nozzles, an auxiliary blast, a pipe connecting said valve-box withsaid steam-nozzles, a second steam-pi e connecting said valve box withthe auxi iary blast, a manually operated valve in said box for shuttingoff steam from said pipes, a steamoperated valve in said box forshutting off steam from pipe leading to the auxiliary blast and forsimultaneously preventing the first named valve from shutting off steamfrom the pipe leading to the steam-nozzles, another valve, a rotatableaxially displaceable rod connected with the last named valve, an armrigidly secured on said rod, an axially slidable rod connected with saidfirst named valve, an axially non-displaceable hollow-shaft rotatable onsaid last named rod, an arm being provided with projections having theform of spherical segments, links between said arms, pivots for movablysecuring said links to said arms, said arms being provided with holesfor said pivots, said holes being gradually enlarged toward the lateralsurface of said arms.

In testimony whereof, I afiix my signature in the presence of twowitnesses.

GUSTAV DE GRAHL.

Witnesses HENRY HAsPnn, WOLDEMAR HAUPT.

